Blender VSE - speed control and cross effect at the same time
You need to put the cross on the speed control strip, not the original strip. You see only the cross at the moment because it is the top most.

Here is the step by step process:


Add the speed strip  (in your case to the rejs_anima... image strip)
Select the newly added speed strip (not the original image strip) and the second video strip (MVI_... in your case) then
Add the cross strip